# Lesson Worksheet: Mechanical Devices: Levers Science

In this worksheet, we will practice describing how levers work and why they are useful and identifying devices that use levers.

Q1:

Mason and Sophia are talking about levers. Who is correct?

• ASophia
• BMason

Q2:

Jacob is trying to unscrew a bolt.

Fill in the blank: The the spanner is, the easier it is to unscrew the bolt.

• Alonger
• Bshorter

Q3:

Daniel wants to unscrew this bolt. Will the bolt unscrew more easily if he uses a wrench or his bare hands?

• AWith his bare hands
• BWith a wrench

Q4:

Which image shows the best way to lift up the doll?

• AA
• BB

Q5:

Look at this image of a can of paint.

Would it be easier to open this can of paint with a long screwdriver or a coin?

• AA coin
• BA long screwdriver

Fill in the blanks to explain your answer: The edge of the lid is a pivot and the force used is the pivot.

• Apull, closer to
• Bpush, closer to
• Cpull, farther from
• Dpush, farther from

Q6:

Which image shows the harder way to lift up the pile of bricks?

• AB
• BA

Q7:

This is a lever. A lever is a device that turns a small force into a larger effect.

Fill in the blank: Using a lever would be most useful when lifting a very object.

• Alight
• Bheavy

Q8:

If we use a small push force at the end of this lever, we get a bigger push force on the other end.

Fill in the blanks: The lever makes it to lift the box because the force that David applies is the pivot than the box is.

• Aeasier, closer to
• Beasier, farther from
• Charder, farther from
• Dharder, closer to

Q9:

In which image is the robot’s weight force acting closer to the pivot?

• A2
• B1

Q10:

When a heavy object is closer to the pivot of this lever, it is easier to lift it up.

Fill in the blank: A small force applied to the lever produces a force to lift the object.

• Alarger
• Bsmaller